ABAP Select data from SAP table P2RG_CAR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RG_CAR table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to P2RG_CAR. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the P2RG_CAR table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_P2RG_CAR TYPE STANDARD TABLE OF P2RG_CAR,
      WA_P2RG_CAR TYPE P2RG_CAR,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <P2RG_CAR> TYPE P2RG_CAR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RG_CAR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RG_CAR
  INTO TABLE IT_P2RG_CAR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RG_CAR
*  INTO TABLE @DATA(IT_P2RG_CAR2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_P2RG_CAR INDEX 1 INTO DATA(WA_P2RG_CAR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RG_CAR ASSIGNING <P2RG_CAR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RG_CAR>-MANDT = 1.
<P2RG_CAR>-DCT_PERNR = 1.
<P2RG_CAR>-DCT_SEQNR = 1.
<P2RG_CAR>-DCT_ROWID = 1.
<P2RG_CAR>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_P2RG_CAR INTO WA_P2RG_CAR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RG_CAR-ENDDA, sy-vline,
  WA_P2RG_CAR-CRNUM, sy-vline,
  WA_P2RG_CAR-INDYR, sy-vline,
  WA_P2RG_CAR-FCBEN, sy-vline,
  WA_P2RG_CAR-TXBEN, sy-vline,
  WA_P2RG_CAR-NIC1A, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RG_CAR you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_P2RG_CAR TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_P2RG_CAR INTO WA_P2RG_CAR.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P2RG_CAR_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CRNUM TYPE STRING,
INDYR TYPE STRING,
FCBEN TYPE STRING,
TXBEN TYPE STRING,
NIC1A TYPE STRING,
TOTAV TYPE STRING,
MBAND TYPE STRING,
RGNDA TYPE STRING,
TTPPU TYPE STRING,
FSCHG TYPE STRING,
NIRTE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RG_CAR_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_P2RG_CAR_STR-MANDT sy-vline 
WA_P2RG_CAR_STR-DCT_PERNR sy-vline 
WA_P2RG_CAR_STR-DCT_SEQNR sy-vline 
WA_P2RG_CAR_STR-DCT_ROWID sy-vline 
WA_P2RG_CAR_STR-BEGDA sy-vline 
WA_P2RG_CAR_STR-ENDDA sy-vline 
WA_P2RG_CAR_STR-CRNUM sy-vline 
WA_P2RG_CAR_STR-INDYR sy-vline 
WA_P2RG_CAR_STR-FCBEN sy-vline 
WA_P2RG_CAR_STR-TXBEN sy-vline 
WA_P2RG_CAR_STR-NIC1A sy-vline 
WA_P2RG_CAR_STR-TOTAV sy-vline 
WA_P2RG_CAR_STR-MBAND sy-vline 
WA_P2RG_CAR_STR-RGNDA sy-vline 
WA_P2RG_CAR_STR-TTPPU sy-vline 
WA_P2RG_CAR_STR-FSCHG sy-vline 
WA_P2RG_CAR_STR-NIRTE sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.